m68k: rename CONFIG_MCFTMR to CFG_MCFTMR

This is not a Kconfig option so changing to _CFG.

Signed-off-by: Angelo Durgehello <angelo@kernel-space.org>
diff --git a/include/configs/M5282EVB.h b/include/configs/M5282EVB.h
index 31699a4..f04d9b1 100644
--- a/include/configs/M5282EVB.h
+++ b/include/configs/M5282EVB.h
@@ -127,4 +127,6 @@
 #define CFG_SYS_DDRUA		0x05
 #define CFG_SYS_PJPAR		0xFF
 
+#define CFG_MCFTMR
+
 #endif				/* _CONFIG_M5282EVB_H */